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Fencer Vulns
high 7.5

CVE-2021-43222 json

Microsoft Message Queuing Information Disclosure Vulnerability

published 2021-12-15 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30166

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.2%
EPSS 3.2% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

Microsoft Message Queuing Information Disclosure Vulnerability

Patch / fix

  • Microsoft Windows 10 Version 1809 10.0.17763.2366
  • Microsoft Windows Server 2019 10.0.17763.2366
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.2366
  • Microsoft Windows 10 Version 1909 10.0.18363.1977
  • Microsoft Windows 10 Version 21H1 10.0.19043.1415
  • Microsoft Windows Server 2022 10.0.20348.405
  • Microsoft Windows 10 Version 2004 10.0.19041.1415
  • Microsoft Windows Server version 2004 10.0.19041.1415
  • Microsoft Windows 10 Version 20H2 10.0.19042.1415
  • Microsoft Windows Server version 20H2 10.0.19042.1415
  • Microsoft Windows 11 version 21H2 10.0.22000.376
  • Microsoft Windows 10 Version 21H2 10.0.19044.1415
  • Microsoft Windows 10 Version 1507 10.0.10240.19145
  • Microsoft Windows 10 Version 1607 10.0.14393.4825
  • Microsoft Windows Server 2016 10.0.14393.4825
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.4825
  • Microsoft Windows 7 6.1.7601.25796
  • Microsoft Windows 7 Service Pack 1 6.1.7601.25796
  • Microsoft Windows 8.1 6.3.9600.20207
  • Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21309
  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.21309
  • Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21309
  • Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.25796
  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.25796
  • Microsoft Windows Server 2012 6.2.9200.23540, 6.2.9200.23545
  • Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.23540, 6.2.9200.23545
  • Microsoft Windows Server 2012 R2 6.3.9600.20207
  • Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.20207

Exploit prediction

3.17% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

  • Microsoft Windows 10 Version 1809
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows 10 Version 1909
  • Microsoft Windows 10 Version 21H1
  • Microsoft Windows Server 2022
  • Microsoft Windows 10 Version 2004
  • Microsoft Windows Server version 2004
  • Microsoft Windows 10 Version 20H2
  • Microsoft Windows Server version 20H2
  • Microsoft Windows 11 version 21H2
  • Microsoft Windows 10 Version 21H2
  • Microsoft Windows 10 Version 1507
  • Microsoft Windows 10 Version 1607
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows 7
  • Microsoft Windows 7 Service Pack 1
  • Microsoft Windows 8.1
  • Microsoft Windows Server 2008 Service Pack 2
  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
  • Microsoft Windows Server 2008 Service Pack 2
  • Microsoft Windows Server 2008 R2 Service Pack 1
  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2012 (Server Core installation)
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2012 R2 (Server Core installation)

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.